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//Chapter 3: The Antenna Family
//Example 3-11.1
clc;
//Variable Initialization
n = 4 //Number of patch antennas (lambda)
diameter = 0.5 //Diameter of patch antennas (lambda)
//Calculation
A_e = n*diameter //Effective aperture (lambda^2)
D = (4*%pi*A_e) //Directivity (unitless)
D_dbi = 10*log10(D) //Directivity (dBi)
ohm_a = (4*%pi)/D //Beam area (steradians)
//Result
mprintf("The directivity is %d or %d dBi",D,D_dbi)
mprintf("\nThe beam area is %.1f sr", ohm_a)
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